5 Common Causes of Blocked Drains and How to Prevent Them

Posted by Melbourne Blocked Drains Plumbing on 17 Oct 2025

Blocked drains are a source of frustration that could cause disruption to your daily life. They could cause flooding, bad smells, and even health hazards. If not promptly dealt with, blocked drains can cause severe problems for the plumbing system, which can lead to costly maintenance or repairs.

Key Takeaways

  • Drains that are blocked can interrupt your routine and can cause the destruction of your home, bad odours and even health hazards.
  • Grease, oil and fat accumulation can build up on the walls of pipes causing blockages; avoid pouring grease down the drain. Alternatively, use hot water and soap when washing dishes.
  • The roots of trees naturally expand in the ground to find nutrients. This can cause massive damage and completely block pipes leading to flooding; regularly keep trees in the vicinity of drainage systems by trimming them.
  • The flushing of non-biodegradable products like wet towels, wipes and sanitary pads etc. can cause unpleasant smells emanating from bins and toilets. make sure to take care to wash your toilet paper in the toilet.
  • Hair

In this article, we will explore five causes of blocked drains and how you can prevent them from happening.

Cause 1. Grease, oil and Fat Buildup

Fat, grease, and oil may seem like harmless substances to flush down the drain, but as time passes, they build up over the insides of the pipes, which causes a blockage. In this case, water is unable to flow freely through the drainpipes. The solution is to stop pouring grease down the drain. Or make use of hot water and soap while cleaning dishes as it helps break down grease-based substances.

Cause 2. Tree Roots

The tree’s roots gradually extend their roots into the earth looking for nutrients. This means that they grow towards underground pipes. Once they are inside the pipes, tree roots can cause substantial damage and may completely stop them from flowing, causing flooding. It’s important therefore if you have trees around that you regularly maintain their growth in the drainage system by trimming them on a regular basis.

Cause 3: Item that has been thrown away

It’s easy to assume that flushing biodegradable products such as wet wipes, sanitary towels etc. won’t cause any significant problems in the long term, however, if too many of these items go into toilets, they can build up, pushing other items aside and in the way of pipes. This could result in nasty smells emanating in the vicinity of toilets or bins! Always remember what should be flushed away and what should not (i. it is only toilet papers should have to be flushed).

Cause 4 Cause 4: Hair

Additional Information

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Are you experiencing a clogged toilet, blocked shower drain, overflowing drains or an issue with your kitchen sink? We can help you sort out your drain blockage problem quickly and provide the following services:

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Clearing blocked drains can be difficult and it’s best to get a professional plumbing service involved to tackle it for you, To get your blocked drain in Melbourne cleared today, contact Melbourne Blocked Drains Plumbing now and speak to one of our friendly team members.

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